BS EN 60317-70:2017

1   Scope This part of IEC 60317 specifies requirements of polyester glass-fibre wound fused, unvarnished or resin or varnish impregnated, bare or grade 1 or grade 2 enamelled round copper winding wires, temperature index 155. The impregnating agent can be, for instance, epoxy, polyester, or polyesterimide resin based.

    NOTE  For this type of wire, the heat shock test is inappropriate and therefore a heat shock
     temperature cannot be established. Consequently, a class based on the requirements
     for temperature index and heat shock temperature cannot be specified.